Mining-machine.



Pateted Apr. 9, |90I. c. E. DAVIS. MINING' MACHINE, |App1cat-ion medJan. 18, 1897.)

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C. E. DAVIS.

MINING MACHINE. mppliction med Jan. 1s, 1897.; (No Model.) 2Sheets-Sheet 2.`

UNITED STATES PATENT OFFICE.

CHARLES E. DAVIS, OFCHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGN- MENTS,TO THE GOODMAN MANUFACTURING COMPANY, OF SAME PLACE.

MINING-MACHINE.

SPECIFICATION forming' part of Lettersv Patent N o. 671,818, dated April9, 1901.

Application ined .Tammy 18, 1897.

To all whom it may concern:

Be it knownv that I, CHARLES E. DAVIS, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain Improvements in Mining-Machines, of which the followingis a specilication.

My invention relates to mining-machines, and has for its object toprovide a new and improved mining-machine, of which the following is adescription, reference being had to the accompanying drawings, wherein-Figure 1 is a plan View of a mining-machine embodying my invention. Fig.2 is a side elevation of the same. Fig. 3 is a section on line 3 3,Fig. 1. Fig. 4 is a section on line 4 4, Fig. l. Fig. 5 is a section online 5 5, Fig. 1, with parts omitted. Fig. 6 is a section on line 6 6,Fig. 4, with parts omitted.

Like letters refer to like parts throughout the several figures.

I have shown my invention in connection with the general type ofbreast-machine having a stationary and movable frame, the movable framebeing provided with a cutter which acts upon the coal or other materialoperated upon.

AsV illustrated in the drawings, the stationary frame consists of thepieces A A, connected together by suitable cross-pieces. This stationaryframe is provided with the downwardly-projecting parts B, adapted toengage the floor of the mine. At the rear end the frame is provided withthe downwardly-projecting parts B B', provided with the rotatable partsB2 on the shafts BS and preferably so connected with the projectingparts Bthat they partly project therefrom. The stationary frame isprovided with thel jacks C C', at each end thereof, by which it is heldin position. The rotatable parts B2 preferably have a relative iXedposition with relation to the frame and are provided with some suitablelocking device, so that they may be held stationary while the machine isbeing operated. As shown in the drawings, the jack C is provided with aprojecting rod C2,passing through enlarged openings in the lock CS. Saidrod projects over the rotatable parts or rollers B2 B2, as shown, forexample, in Fig. 4. Each of the rotatable parts is preferably providedSerial No. 619,512. No model.)

with a groove B4 opposite the projecting ends of the rods C2. When thejack C is in the position shown in Fig. 2--that is, in its holdingposition-the rod C2 is forced into en- 55 gagement with the rotatableparts B2, so as to lock them against rotation. When the jack C isdisengaged and lowered to the position shown in Fig. 6, it rests uponthe projection C4 on the frame and the rod C2 is lifted, so as to 6o bedisengaged from the rollers B2, thereby leaving them free to rotate.

The movable frame D is provided with a cutter-chain D', which isoperatively co'uf" nected with the motor, so that it can be moved alongthe surface of the material to be cut. This frame is located beneath thestationary frame and is provided with suitable guides, which allow it tobe moved back and forward. This frame is so positioned and the cutters7o on the cutter-chain are so shaped that the bottom of the kerl` issubstantially on a level with the floor of the mine. In breast-machinesas heretofore used a portion of the coal or other material is leftprojecting above the floor of the mine and must be removed before themachine can be moved forward. By the use of my construction thisdifficulty is obviated, as the bottom of the kerf is alwayssubstantially on a level with the mine-floor. 8o

It is of course evident that this result may be obtained by variousconstructions. As illustrated in the drawings, the movable frame D isprovided with the two guiding pieces or strips D2, whichengage theupwardly-projecting piece D3 ou the part B. These strips D2 also engagethe projections D4 on the part B, said strips sliding along as thecutter-carrying frame D is moved. The cutter-carrying frame is providedwith the 9o adjusting-screws D5, the parts of the frame being movablerelatively, so that it can be adjusted to regulate the tension of thechain.

A motor E, of any suitable description, is mounted upon thecutter-carrying frame andv connected with the operating parts of theinachine. This motor and the accompanying parts rest upon the pieces A Aand slide therealong. The armatu re-shaft of the motor is provided withthe pinion E', which engages Ioo the gear E2. A beveled pinion E3 isrigidly connected with said gear, so as to be operated shaft.

3o the gear F2.

thereby, and engages a beveled gear E5 on the upright shaft E0, mountedin suitable bearings and carrying the sprocket-wheel E7, by which thecutting-chain D is operated. Said 5 shaft is provided with a wormE3,which engages a worm-gear E9 on the shaft E10, provided with the pinionsF F. The pinion F engages the gear F2 on the shaft G, and the pinionli"A engages the internal gear F3 on said 1o shaft, the two gears F2 andF3 being loosely 2o rigidly connected together by means of the rod G3,so as to move simultaneously. These clutches may be of any desiredconstruction,

and the shaft G is made hollow, so as to contain the rod G0, said rodthus being concealed from view. The clutch G2 is connected to the shaftG by means of the pin G4,

which passes through a slot in the shaft, the slot being long enough toallow the clutch to be moved into and out of engagement with Said clutchG2 is provided with a. groove carrying a movable ri ng G5, which isprovided with the projections'GG, engaging the forked or bifurcatedlever G7, which is used to shift the clutch. This leveris pivotallyconnected with some part of the fxalne.

As illustrated in the drawings, said lever is connected with thecross-pieces G3 (see Fig. 5)

by means of the pin G0, said pin being formed at its upper end so as toreceive a hand-le- 4o ver by which the clutch may be moved. By

this construction 1 am enabled to do away with an eXtra idle gear, whichwould be necessary in order to obtain the proper motion if the gear F2were an external gear.

The lever G7 is provided with the end G10,

which is so positioned as to engage the projections A A2 on thestationary frame when the motor has reached the limit of its travel ineither direction, thereby automatically 5o shifting the clutch. Theshaft G is provided with the engaging wheels H H', which engage asuitable rack on the stationary frame, thereby causing a relativemovement of the frames when operatively connected with the motor.

These racks are made very strong and consist of the pieces A3, which areconnected to the pieces A A of the stationary frame. A series of pins A4are interposed between the pieces A3 and the pieces A, so as to form a6o rack or ladder, the pins being engaged by the engaging wheels H H.Each of these pins is preferably surrounded by a sleeve A5, as shown inFig. 4.

l have described these several parts in detail; butitis evident thatthey may be greatly varied in form, construction, and arrangementwithout departing from the, spirit of gear F2 is opposite.

my invention, and Itherefore do not wish to be limited to theconstruction shown.

The use and operation of my invention are as follows: When the machineis in operation, the cutter-carrying frame moves backward and forwardalong' the stationary frame and the cutters on the cutting-chainundermine the coal or other material operated upon. When it is desiredto start the machine, the motor is set in motion and the clutch G ismoved so as to engage the gear F3, and the motor drives thecutting-chain and the shaft G. The engaging wheels H vH on the shaft Gengage the pins A4 of the rack and feed the machine forward. Whenthemachine has reached the limit of its forward movement, the lever G10makes contact with the projection A2 and the clutch is moved, so as todisengage the clutch G from the gear F3 and stop the forward movement ofthe cutter-carrying frame. The motion of said frame is reversed bymoving the clutch G2 into engagement with the gear F2. The motion ofsaid frame is again arrested aloy the lever G10 coming in contact withthe projection A. The

direction of motion of the cutter-carrying frame can be changed at anyintermediate point by moving the clutch mechanism by hand. The manner ofconnecting these two clutches so that they move as one piece forms a.compact and simple device for accomplishing the reversal of thecutter-carrying frame.

It will be noticed that the gear F3 is an inbex-nal gear and that thepinion F on the shaft E10 engages said internal gear. This constructiondoes away with an ext-ra. idle gear,

which would be necessary in order to obtain the results desired if thegear F3 were an external gear. It will be seen that in the presentconstruction the direction of motion of the pinion F and of the internalgear F3 is the same, while that of the pinion F and the If the gear F3were an external gear, it would be necessary to place an intermediateidle gear between the pinion F and gear F3 in order to rotatesaid gearand pinion in the same direction.

When the machine is in its working position and the jacks are placed soas to hold it from motion, the rollers B2 are held stationary. When itis desired to move theV machine, the jacks are lowered, therebyreleasing the rollers, and a supporting-piece is placed under saidrollers, as shown in Fig. 2, the machine being rolled along saidsupporting-piece until it has reached the desired position. The motor ofcourse is moved to the position in Fig. 2 when the machine is beingmoved, so that the greater part of the weight Will be upon the rollers.A v A The tension of the cutting-chain is regulated by means of the adjusting-screws D5.

I claimn 1. In a chain breast mining-machine, the combination of thestationary supportingframe With the movable forwardly-travelingcutter-carrying frame and rotatable part or IOO IIO

parts mounted on the stationary frame with their axes substantiallyparallel with the direction in which the cutter-carrying frame moves,whereby the machine may be moved laterally on such rotating parts, and alocking device to lock such rotating parts from rotation when themachine is cutting, such locking part associated with the jacks so thatwhen the jacks are brought into position to hold the machine therotating parts are automatically locked from rotation.

2. A mining-machine comprising a stationary frame upon Which theoperating mechanism is supported,and having at its rear end one or moredownwardly-projecting shoes or supports,a roller associated with each ofsaid shoes or supports and mounted on the frame, said roller or rollersadapted to engage a supporting-piece placed beneath the shoe so as toa1- loW the machine to be moved laterally, a holdin g-j ack connectedwith arod passing through an enlarged opening or openings in the trame,said rod so positioned as to be opposed to said roller or rollers, theopenings through Which said rod passes of such size that the rod engagessaid roller or rollers when the jack is in its operative position andlocks said roller or rollers from rotation.

CHARLES E. DAVIS. Witnesses:

DONALD M. CARTER, LILLEY JoHNsToNE.

